New cotton leaf fertilizer spraying technology

First, the cotton seedlings at the seedling stage of spraying cotton fertilizer spraying fertilizer at the seedling stage leaves, can promote the early emergence of cotton seedlings, promote weak seedlings into strong seedlings, and can control plant height, prevent leggy. Optional spray fertilizer No. 1. It is dominated by nitrogenous fertilizers, containing 34.7% nitrogen, 6.6% phosphorus, and 6.6% potassium, as well as boron, iron, molybdenum, zinc, magnesium, manganese and copper. The concentration is 1.5% to 2%. Before the spraying, the powder was melted with a small amount of water, and then the amount of water was sprayed in proportion to the amount of water after spraying at 4 o'clock in the afternoon without wind. The back of the cotton leaf is a sponge tissue, which has a strong suction ability. The fertilizer should be sprayed as far as possible on the back of the leaf to increase the absorption and utilization. Can also use the 4010E-6 ~ 6010E-6 solution concentration of 702 can promote Miao Qi, Miao Zhuang, early bud, flowering, and reduce the disease. If the growth of cotton seedlings is not neat, for those that are short and thin, they can spray 4010E-6-5010E-6 solution concentration of 702, plus 1%-2% superphosphate soaking filtrate; also can spray 3010E-6 4010E-6 solution concentration of 902 and 410E-6-610E-6 solution concentration of 90%, plus 1% to 2% of superphosphate and 1% of urea (biuret content of more than 1.5% of urea, Can not spray leaves), prompting weak seedlings to catch strong seedlings.
In the 5-leaf stage of cotton seedlings, if it grows well and has prosperous growth, it can spray 50kg of chlorella solution of 4010E-6~8010E-6 concentration (equivalent to 2-4g of active ingredient) to make its plant type. Compact, small and thick leaves, and promote the development of the root system, in order to facilitate budding and ringing.
Second, the cotton buds in the bud stage of the spray fertilizer into the vegetative growth and reproductive growth and progress, still dominated by vegetative growth. At this time, the temperature is high and the light shines. If the rain is abundant, the plants grow faster. For normal growing cotton fields, potassium dihydrogen phosphate 300-500 times solution plus appropriate amount of zinc fertilizer can be used. If the growth peak of cotton plants occurs before flowering, it indicates that the vegetative growth is too fast and may be closed early to make the field microclimate worse. Increase the shedding of the bells in the middle and lower parts. Such cotton fields need to be sprayed with inhibitors to control the growth of the main stem and the fruit branches of cotton plants. That is, in the cotton bud stage, with 1.5 g of salicylamine or regulating amine per 667 square meters, 50 kg of water is sprayed.
Third, the flowering and bolling stage of cotton leaf cotton fertilizer boll period is the vegetative and reproductive growth and development, but will gradually transform into reproductive growth as the center. At this time, the cotton plant needs a large amount of fertilizer, which is a crucial period for the production.
During the flowering period of cotton, the best fertilizer is foliar fertilizer, which is rich in nitrogen, phosphorus and potassium. The concentration is 2%, and 75 kg per 667 square meters of cotton spray dilution can promote high yield and quality. it is good.
In the flowering stage of cotton, the leaves may be sprayed with fertilizer, which can also be used to obtain too much fertilizer. The ordinary concentration solution is diluted to 1000 times (100 kg per bottle of water for 100 kg), and the high concentration solution is diluted to 5000 times (that is, 10 for each The milliliter of water is 50 kg), sprayed on the back of the cotton leaf. It can also be sprayed on the hair (a humic acid type of liquid fertilizer), diluted 500 to 1000 times, sprayed on the back of cotton leaves. It can not only promote the robust development of cotton plants, but also delay the damage of drought and pests to cotton plants.
The spraying of leaves at the flowering stage should be targeted. Such as plant dwarf, underdeveloped root system, dark purple leaves, indicating that phosphorus deficiency can be sprayed with 2% of superphosphate, or 0.2% to 0.3% of potassium dihydrogen phosphate, spraying liquid fertilizer per 667 square meters 60 kilograms to reduce Lei Ling fell off, but also play a role in strengthening the peach. If the growth is not prosperous, the leaf color is light yellow, when nitrogen is insufficient, 1% urea can be sprayed, and 50 kg of the solution can be sprayed per 667 square meters.
Spraying hormones during the flowering and bolling period can also reduce the shedding of boll bells, promote multi-crusted peach, and stabilize the peach. At the flowering stage, spraying 50 kg to 75 kg per 667 m2 of the concentration of the 2010E-6 solution, or spraying 50 kg of the 0.110E-6 solution of the triacontanol solution, can achieve satisfactory results. It is also possible to spray 701 in the concentration of 2010E-6 solution and 50 kg of fertilizer solution per 667 square meters during the flowering and bolling period, which can increase the number of bolls and increase the length of the velvet. In the flowering and bolling period, use the 9O0 solution of 2010E-6 solution concentration and put it into the “point sprayer” to spray the corolla of the day or the young bell of 1 to 3 days (when the young bell is sprayed, the corolla should be removed) Or use a brush or a small drop of the bottle to spread or spot the liquid on the corolla or young bell. The whole plant can also be sprayed with 90% of the 1010E-6 solution concentration. After the treatment of cotton by the 1990s, the bell falls, the output increases, and the fiber grows, but the infertile seeds increase, and the seed field should not be used.
After flowering and topping, when the top fruit branch grows 1 to 2 fruits, if the growth of the cotton plant is still too prosperous, 5010 E-6 solution concentration of CCC can be sprayed again to control the leggy. However, before the topping and within 5 days after the topping, no KHC could be sprayed to prevent the top fruit branches from coming out and causing a reduction in production.
In the cotton boll opening stage, the nutrient growth is almost stopped, the leaves gradually become old, and the ability of the root to absorb fertilizer and water is weakened. For premature decompensation of cotton, per 667 square meters can be sprayed with 1% to 1.5% urea 60 kg to 75 kg; for normal growth or growing trend of the cotton field, can spray 2% to 3% of superphosphate calcium leaching solution 60 kg to 75 Kilograms prevent premature aging and promote premature maturity.
For greedy and late-maturing cotton, when most of the cotton bolls have been substantially grown and began to harvest, they can use 40% ethephon 100-150 grams per 667 square meters, add 30 kilograms of water, and spray the leaves to promote the premature maturity of cotton. The grade of cotton.
Author: Anhui Huainan Dongshan Zhong'an Institute of Technology

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